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forbid writing to boot1/boot2

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bushing 2009-02-16 04:49:11 -08:00
parent e14be86d6c
commit d2b0ec94ec
1 changed files with 8 additions and 0 deletions
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8
nand.c
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@ -145,6 +145,10 @@ void nand_read_page(u32 pageno, void *data, void *ecc) {
#ifdef NAND_SUPPORT_WRITE #ifdef NAND_SUPPORT_WRITE
void nand_write_page(u32 pageno, void *data, void *ecc) { void nand_write_page(u32 pageno, void *data, void *ecc) {
NAND_debug("nand_write_page(%u, %p, %p)\n", pageno, data, ecc); NAND_debug("nand_write_page(%u, %p, %p)\n", pageno, data, ecc);
if (pageno < 0x200) {
printf("Error: nand_write to page %d forbidden\n", pageno);
return;
}
dc_flushrange(data, 0x800); dc_flushrange(data, 0x800);
dc_flushrange(ecc, 0x40); dc_flushrange(ecc, 0x40);
__nand_set_address(0, pageno); __nand_set_address(0, pageno);
@ -158,6 +162,10 @@ void nand_write_page(u32 pageno, void *data, void *ecc) {
#ifdef NAND_SUPPORT_ERASE #ifdef NAND_SUPPORT_ERASE
void nand_erase_block(u32 pageno) { void nand_erase_block(u32 pageno) {
NAND_debug("nand_erase_block(%d)\n", pageno); NAND_debug("nand_erase_block(%d)\n", pageno);
if (pageno < 0x200) {
printf("Error: nand_erase to page %d forbidden\n", pageno);
return;
}
__nand_set_address(0, pageno); __nand_set_address(0, pageno);
nand_send_command(NAND_ERASE_PRE, 0x1c, 0, 0); nand_send_command(NAND_ERASE_PRE, 0x1c, 0, 0);
nand_send_command(NAND_ERASE_POST, 0, NAND_FLAGS_IRQ | 0x8000, 0x0); nand_send_command(NAND_ERASE_POST, 0, NAND_FLAGS_IRQ | 0x8000, 0x0);